Weed Eater 1700 - Engine Adjustments

E. ENGINE ADJUSTMENTS
1. CARBURETOR ADJUSTMENTS
The carburetor has been carefully adjusted
at the factory. Due to changes in altitude and
operating conditions, your carburetor may
require adjusting. It is best to let your
authorized dealer make this adjustment, if
you choose to make the adjustment yourself,
follow the procedure below very carefully:
a. PREPARATION
1.) Use fresh fuel mix. Refer to page 6.
Make sure the cutting iine extends to
the length allowed by the line iimiterto
provide correct load on engine.
Remove air filter.
4.) Turn both low speed and high speed
mixture screws clockwise
until fully closed, but do not over
tighten. Figure 10. Unscrew both mix
ture screws exactly one full turn
counterclockwise
2.)
3.)
b. IDLE SPEED ADJUSTMENT
1.) Turn Idle Speed Screw clockwise
until it stops. Do not over
tighten. Open screw one full turn coun
terclockwise
2.) Start the engine and cut grass for 3
minutes to warm up engine.
3.) Allow engine to idle.
4.) Adjust Idle Speed Screw:
Clockwise if engine stalls.
Counterclockwise A. to slow
engine down and/or to keep cutting
head from turning.
ICAUTION:! High and low speed mixture
settings are highly critical adjustments. If
set incorrectly permanent damage will oc
cur to the engine.
HIGH SPEED
MIXTURE SCREW
IDLE SPEED SCREW
LOW SPEED
MIXTURE SCREW
AIR FILTER (removed)
c. LOW SPEED MIXTURE ADJUSTMENT
1.) Allow engine to idle.
2.) Turn Low Speed Mixture Screw clock
wise ^ ^ slowly. Note the position at
which engine speed is reduced.
3.) Turn the screw slowly counterclockwise
A ^ . Note the position at which the
speed is reduced.
4.) Set the screw mid-way between these
two extreme positions.
NOTE: The low speed mix sc 3W
should be in the range of 3/4 to 1-1/4
turns open.
d. IDLE SPEED ADJUSTMENT
1.) Adjust the Idle Speed Screw until the
engine idles as fast as possible
without the cutting head turning.
g
CAUTION:! Do not operate engine at full
throttle for prolonged periods while mak
ing high speed adjustments as damage to
the engine can occur.
e. HIGH SPEED MIXTURE ADJUSTMENT:
1.) Support the shaft so that the cutting
head is off the ground and the cutting
line will not contact any object.
2.) Squeeze throttle trigger wide open.
3.) Turn the High Speed Mixture Screw
slowly clockwise ^ k until the
engine speed is reduced. Note posi
tion.
4.) Turn the screw slowly counterclock
wise A ^ . Stop when the engine
just begins to run rough.
5.) Turn the screw slowly the minimum
amount clockwise unti l the
engine runs smoothly.
NOTE 1: The high speed mix screw
should be in the range of 3/4 to 1-1/4
turns open.
NOTE 2: For the best engine perfor
mance, it is better to run a slightly rich
high speed mixture setting (counter
clockwise A ^ ) than too lean a
setting.
f. CHECK ACCELERATION
Allow the engine to idle. Squeeze trigger
and check engine acceleration. If the
engine does not accelerate smoothly, you
may have to repeat steps "b.4.)" through
NOTE: Generally, by turning the Low
Speed Screw counterclockwise
a small amount, the unit will accelerate
properly.
REPLACE AIR FILTER.
Figure 10
2. SPARK PLUG
Check spark plug periodically and clean or
replace as necessary. After cleaning, reset
the electrode gap to .025".
9